•Forecasted weekly sales of Walmart during holiday and non-holiday weeks across various regions to discover which factors impact sales and derive actionable insights to enhance the sales •Analyzed predictors using Mosaic plots, scatterplots, incorporated data cleansing through outlier rectification and feature selection in SAS JMP. Generated ensemble models such as Partition Tree, Random forest, KNN Cluster to compare accuracy scores and error metrics against linear models in SAS for accurate predictions in sales. Random Forest was identified as best model with 89% accuracy

1. Retail
Data
Analytics
Team 5:
Saiviveka Murali
Shweta Ikhe
Swaraj Machiraju
Bidisha Datta

2. Problem Statement
The objective is to predict the weekly sales of a Retail
Store looking at previous years performance per Store
on a weekly basis.
To analyze how internal and external factors can affect
the Weekly Sales in the future.
To Provide recommended actions based on the
insights drawn, with prioritization placed on largest
business impact

3. Phases Of SEMMA
Sample
Explore
Modify
Model
Assess
•Explored various relationships
between the variables
• Selected the retail data set
•Transformed variables
for data modeling
• Applied various modeling
• Evaluation of the modeling

4. SAMPLING

5. Size
Temperature
Fuel price
CPI
Is Holiday
Markdown
Unemployment
Store
Weekly
Sales

6. DATA
EXPLORATION

8. Collinearity: Size and Type

9. Size vs WeeklySales

10. Negative relationship between CPI & WeeklySales

11. Temperature and WeeklySales Fuel_price and WeeklySales

12. Increase in WeeklySales during Holiday Season

13. DATA
PRE-PROCESSING

14. • Identified missing data and outliers
• Handled missing items using Normal
Imputation
• Reduced outliers using Normal 3
Transformation
• Target variable scaled down by a factor of
1000
DATA PRE-PROCESSING

15. DATA
MODELING

16. Regression-
Standard Least
Square Method
• Backward elimination
• 5% p-value threshold
Prediction Metrics
Rsquare 0.652
Avg
Residuals %
-0.077
RSquare Adj 0.651

17. Why Not a Linear Regression Model?
Variation of the dependent & independent variables aross 3 years

18. Partition Model
Prediction Metrics
Rsquare 0.907
Avg
Residuals %
0.0013
RMSE 172.9
Contributing Variables:
Size, CPI,
Unemployment,
Temperature, Markdown

19. Boosted Tree
Prediction Metrics
Rsquare 0.802
Avg
Residuals %
0.021
RMSE 252.42
Contributing Variables:
Size, Unemployment,
CPI, Temperature, Fuel
Price

20. Bootsrap Forest
Prediction Metrics
Rsquare 0.539
Avg
Residuals %
0.0466
RMSE 385.022
Contributing Variables:
Size, Unemployment,
CPI

21. KNN Cluster
Prediction Metrics
Rsquare 0.8939
Avg
Residuals %
0.00488
RASE 184.78
Contributing Variables:
Size, Unemployment,
CPI, Temperature, Fuel
Price

22. MODEL
EVALUATION
AND
ASSESSMENT

23. Model Comparison

24. Assessment Metrics
Least Fit
Square
Partition Boosted
Tree
Bootstrap
Forest
KNN
Cluster
Avg
Residual
-0.016 0.00133 0.021 0.0467 0.0048
Distribution of Residuals

25. BUSINESS INSIGHTS
Discounts...Discounts….more Discounts….
Average
MarkDown
Average
Stores_Sales

26. One Stop Shop…

27. What Next…
Impact of fuel price on sales on a weekly basis with help of
indicators such as distance of consumer from the stores
Geographical co-ordinates of the store which can help analyze the
impact of temperature on consumer purchase patterns
Extend the exploration to market basket analysis using additional
indicators such as products/consumer goods, departments and
previous and current orders of consumers

28. Questions???